NOTICE: is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum

Response looks OK but the file wont render.

asked 18 Nov '20, 09:52

marianskrisa's gravatar image

accept rate: 0%


Looks fine here but as it is cache-dependent, can you post the output of ?

(18 Nov '20, 10:06) Spiekerooger

For completeness loads in Chrome (including incognito) for me as well and also FWIW Internet Explorer (!). It doesn't mean there isn't a problem with that tile though.

(19 Nov '20, 16:17) SomeoneElse ♦ debug Server Stats Cache Server:

Render Server: Load Average: 14.94

File Status last modified: Wed Nov 11 08:03:27 2020 last modified: Wed Nov 11 08:03:46 2020 last modified: Sun Jul 22 18:07:58 2018 last modified: Wed Nov 11 08:04:25 2020 last modified: Wed Nov 11 08:05:31 2020 last modified: Wed Nov 11 08:06:13 2020 last modified: Wed Nov 11 08:06:19 2020 Browser Request Headers CONTEXT_DOCUMENT_ROOT: /srv/ CONTEXT_PREFIX: /cgi-bin/ DOCUMENT_ROOT: /srv/ GATEWAY_INTERFACE: CGI/1.1 HTTPS: on HTTP_CACHE_CONTROL: max-age=1209600 HTTP_CONNECTION: keep-alive HTTP_HOST: HTTP_SURROGATE_CAPABILITY:"Surrogate/1.0 ESI/1.0" HTTP_USER_AGENT: NONE HTTP_VIA: 1.1 (squid/4.11) HTTP_X_FORWARDED_FOR: 213.160.XXX.XXX, LC_CTYPE: C.UTF-8 PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin QUERY_STRING: REMOTE_ADDR: REMOTE_PORT: 22236 REQUEST_METHOD: GET REQUEST_SCHEME: https REQUEST_URI: /cgi-bin/debug SCRIPT_FILENAME: /srv/ SCRIPT_NAME: /cgi-bin/debug SCRIPT_URI: SCRIPT_URL: /cgi-bin/debug SERVER_ADDR: SERVER_ADMIN: SERVER_NAME: SERVER_PORT: 443 SERVER_PROTOCOL: HTTP/1.1 SERVER_SIGNATURE:

Apache/2.4.41 (Ubuntu) Server at Port 443

SERVER_SOFTWARE: Apache/2.4.41 (Ubuntu)

permanent link

answered 18 Nov '20, 13:44

marianskrisa's gravatar image

accept rate: 0%

edited 18 Nov '20, 13:57

Spiekerooger's gravatar image


Confirmed that the tile is broken on sarkany. I tried to initiate a re-rendering/re-caching but as of now I'm unsure if the /dirty method still works (maybe someone else or SomeoneElse could confirm?). It does look as only this tile is affected, other tiles surrounding this one are not. Maybe related to an outage of the sarkany cache for about ~ 1 hour today at midnight?

(18 Nov '20, 14:04) Spiekerooger

Can you open and do a hard refresh? It should initiate a reload of the tile into the cache.

(18 Nov '20, 14:48) Spiekerooger

Ok I did, but I see no changes.

(18 Nov '20, 18:55) marianskrisa

alt text

This is the tile, what is broken?

permanent link

answered 19 Nov '20, 13:55

andy%20mackey's gravatar image

andy mackey
accept rate: 4%


That tile form sarkany won't display in (at least) firefox. FF says the png contains errors. So I can confirm what marianskrisa says and I've tried a hard refresh from, it won't help - as nginx/squid thinks there is a fine file. It does smell as if the png has some extra or mising bytes in there.

(19 Nov '20, 14:20) Spiekerooger

(for Andy Mackey's benefit) The actual location that tiles are loaded from depends where you are in the world. The person who asked this question is trying to load this tile from an address that translates to - that gives an error. A next-door tile works OK.

The thing that determines what tile server you get is your DNS, so in the UK I currently get, also known as, when I try to load anything from

Separately to the PNG error with this tile trying to load, will of course get a browser certificate warning, because the certificate on the web server is valid for "" (among others) but not for the raw address

(19 Nov '20, 14:52) SomeoneElse ♦

To test this further you can manipulate your local hosts file in setting as the A record for If you then open in FF you'll see the problem as shown by marianskrisa below. And even a hard refresh won't work.

I know that one tile is not the world out of those billions of tiles in 55+ tile caches but it would be really nice to find a solution to solve this by other means than asking the SysOWG. Sth. magic without having to ssh into sarkany ;)

(19 Nov '20, 15:49) Spiekerooger

alt text

(20 Nov '20, 06:28) marianskrisa

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here



Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text]( "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:


question asked: 18 Nov '20, 09:52

question was seen: 1,169 times

last updated: 20 Nov '20, 09:35

NOTICE: is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum